[ IMPORTANT ] VMS RACING Brand. Comes in VMS Racing Branded BOX. Brand New in Box / Never Used / Never Installed . High Quality T-6061 Billet Aluminum. 100% CNC MACHINED BILLET ALUMINUM ( NOT cheap cast-molded aluminum alloy ). Precise threaded fitment and beautiful finish. Easy Installation. Hard Anodized Aluminum for a Long Lasting & Durable Finish. Takes up the space between the bottom of your shift knob and the top of your shift boot for a nice aesthetically pleasing affect. This shift boot retainer adapter will allow you to buy any aftermarket shift knob of your choice and say goodbye to your ugly OEM shift knob. The 12*1.25 shift boot adapter is meant to be used on MANUAL Gear Shifter Lever TRANSMISSIONS (ONLY). NOT meant for use on shifting systems with reverse lockout. M12*1.25 Compatible with Mustang GT CS Premium Convertible Base Bullitt Boss 302 Shelby GT500 05 06 07 08 09 10 11 12 13 14 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 with factory installed shifter . manual transmission 12 x 1.25 thread size shift rod vehicles. Performance Upgrade VMS RACING Shift Boot Retainer Adapter is made of T-6061 Billet Aluminum. It is threaded to manufacturer standards for easy fitment on the vehicles listed as compatible without the need of any special tools. Made from one piece of billet aluminum that is CNC Machined to exacting tolerances. Once the machining is complete, the shift boot adapter is beautifully Hard Anodized to ensure a long lasting finish. The function of this shift boot adapter is to take up the space between the bottom of any aftermarket shift knob and your OEM shift boot making your cockpit look clean and complete again. With this shift boot adapter, you will be able to install any AFTERMARKET shift knob without having to worry about any gapping. Now you can buy any aftermarket shift knob of your choice and say goodbye to your ugly OEM shift knob. The shift boot adapter is meant to be used on MANUAL TRANSMISSIONS (ONLY). NOT meant for use on shifting systems with reverse lockout.